Bay City Water System
Published drinking-water records and contacts for Bay City Water System. System OR4100079. Review sources and dates; not a real-time water assessment.
- System ID
- OR4100079
- State or territory
- OR
- Published population served
- 1400
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 28 — 1993-07-01 – 2028-12-31
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Published testing results
Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.
“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example
Lead and copper: 90th-percentile summaries
These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0 mg/L | 2026-01-01 – 2028-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.00122 mg/L | 2025-07-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Lead (PB90) | 0.007 mg/L | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0.004 mg/L | 2017-01-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0.0036 mg/L | 2016-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2015-01-01 – 2015-12-31 | 2026Q3 |
Published compliance history
20 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Ground Water Rule / Monitoring of Treatment (SWTR-Unfilt/GWR) | 2025-04-01 – 2025-04-30 | Resolved | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 2025-04-01 – 2025-06-30 | Resolved | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 2025-04-01 – 2025-06-30 | Resolved | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 2025-04-01 – 2025-06-30 | Resolved | No | 2026Q3 |
| Lead and Copper Rule / Initial, Follow-up, or Routine Source Water M/R | 2025-01-01 – — | Resolved | No | 2026Q3 |
| Consumer Confidence Rule / Consumer Confidence Report Complete Failure to Report | 2023-07-01 – — | Resolved | No | 2026Q3 |
| Ground Water Rule / Monitoring of Treatment (SWTR-Unfilt/GWR) | 2022-09-01 – 2022-09-30 | Resolved | No | 2026Q3 |
| Lead and Copper Rule / Initial, Follow-up, or Routine Source Water M/R | 2022-07-01 – — | Resolved | No | 2026Q3 |
| Ground Water Rule / Monitoring of Treatment (SWTR-Unfilt/GWR) | 2019-05-01 – 2019-05-31 | Resolved | No | 2026Q3 |
| Ground Water Rule / Monitoring of Treatment (SWTR-Unfilt/GWR) | 2017-03-01 – 2017-03-31 | Resolved | No | 2026Q3 |
| Arsenic Rule / Monitoring, Regular | 1979-06-24 – 1980-06-23 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1979-06-24 – 1980-06-23 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1979-06-24 – 1980-06-23 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1979-06-24 – 1980-06-23 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1979-06-24 – 1980-06-23 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1979-06-24 – 1980-06-23 | Archived | No | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 1979-06-24 – 1980-06-23 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1979-06-24 – 1980-06-23 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 1976-06-01 – 1980-05-31 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 1976-06-01 – 1980-05-31 | Archived | No | 2026Q3 |
Source dates and refresh checks
A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.
- EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
- EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
- EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
Administrative contact (EPA filing)
Bay City Water System: 503-377-4121
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.